/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c


--------------------------------------------------------------------------------


This is Ultimate 0.1.25-5644d1e-m
[2020-08-18 10:42:24,599 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 10:42:24,601 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 10:42:24,627 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 10:42:24,627 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 10:42:24,628 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 10:42:24,631 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 10:42:24,641 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-18 10:42:24,642 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-18 10:42:24,645 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-18 10:42:24,646 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-18 10:42:24,647 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-18 10:42:24,647 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 10:42:24,649 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 10:42:24,651 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 10:42:24,652 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 10:42:24,653 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 10:42:24,654 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 10:42:24,658 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 10:42:24,664 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 10:42:24,667 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 10:42:24,668 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 10:42:24,669 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 10:42:24,672 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 10:42:24,681 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 10:42:24,681 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 10:42:24,681 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 10:42:24,682 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 10:42:24,683 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 10:42:24,689 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 10:42:24,689 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-18 10:42:24,690 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-18 10:42:24,691 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 10:42:24,692 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 10:42:24,694 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 10:42:24,694 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-18 10:42:24,695 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-18 10:42:24,695 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-18 10:42:24,695 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-18 10:42:24,697 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-18 10:42:24,697 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 10:42:24,699 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-08-18 10:42:24,747 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 10:42:24,748 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 10:42:24,749 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 10:42:24,749 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 10:42:24,749 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 10:42:24,750 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 10:42:24,750 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 10:42:24,750 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 10:42:24,751 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 10:42:24,751 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 10:42:24,751 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 10:42:24,751 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 10:42:24,751 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 10:42:24,752 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 10:42:24,753 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 10:42:24,753 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 10:42:24,753 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 10:42:24,753 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 10:42:24,753 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 10:42:24,754 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 10:42:24,754 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 10:42:24,754 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 10:42:24,754 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 10:42:24,754 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 10:42:24,754 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 10:42:24,755 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 10:42:24,755 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 10:42:24,755 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 10:42:24,755 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 10:42:24,755 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false
[2020-08-18 10:42:25,073 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 10:42:25,085 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 10:42:25,088 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 10:42:25,090 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 10:42:25,090 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 10:42:25,091 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 10:42:25,151 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eed94adbe/2995ac3ba696416b9a7e936b828f2735/FLAGb2b0de7ce
[2020-08-18 10:42:25,912 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 10:42:25,913 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 10:42:25,943 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eed94adbe/2995ac3ba696416b9a7e936b828f2735/FLAGb2b0de7ce
[2020-08-18 10:42:26,036 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eed94adbe/2995ac3ba696416b9a7e936b828f2735
[2020-08-18 10:42:26,050 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 10:42:26,052 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 10:42:26,056 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 10:42:26,057 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 10:42:26,060 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 10:42:26,062 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:42:26" (1/1) ...
[2020-08-18 10:42:26,066 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f14d527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:26, skipping insertion in model container
[2020-08-18 10:42:26,066 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:42:26" (1/1) ...
[2020-08-18 10:42:26,076 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 10:42:26,203 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 10:42:27,244 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 10:42:27,260 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 10:42:27,758 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 10:42:27,798 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 10:42:27,799 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27 WrapperNode
[2020-08-18 10:42:27,799 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 10:42:27,800 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 10:42:27,801 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 10:42:27,801 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 10:42:27,820 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (1/1) ...
[2020-08-18 10:42:27,822 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (1/1) ...
[2020-08-18 10:42:27,878 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (1/1) ...
[2020-08-18 10:42:27,879 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (1/1) ...
[2020-08-18 10:42:27,940 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (1/1) ...
[2020-08-18 10:42:27,979 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (1/1) ...
[2020-08-18 10:42:27,986 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (1/1) ...
[2020-08-18 10:42:27,998 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 10:42:27,998 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 10:42:27,999 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 10:42:27,999 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 10:42:28,000 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 10:42:28,085 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 10:42:28,086 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 10:42:28,086 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-18 10:42:28,086 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 10:42:28,087 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 10:42:28,087 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-18 10:42:28,087 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-18 10:42:28,087 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-18 10:42:28,088 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-18 10:42:28,088 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-18 10:42:28,088 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-18 10:42:28,088 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-18 10:42:28,089 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-18 10:42:28,089 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-18 10:42:28,089 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-18 10:42:28,089 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-18 10:42:28,090 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-18 10:42:28,090 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-18 10:42:28,090 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-18 10:42:28,091 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 10:42:28,091 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 10:42:28,091 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 10:42:30,736 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 10:42:30,736 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-18 10:42:30,752 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:42:30 BoogieIcfgContainer
[2020-08-18 10:42:30,758 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 10:42:30,761 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 10:42:30,761 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 10:42:30,764 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 10:42:30,765 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:42:26" (1/3) ...
[2020-08-18 10:42:30,766 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebc4c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:42:30, skipping insertion in model container
[2020-08-18 10:42:30,766 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:27" (2/3) ...
[2020-08-18 10:42:30,766 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebc4c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:42:30, skipping insertion in model container
[2020-08-18 10:42:30,767 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:42:30" (3/3) ...
[2020-08-18 10:42:30,769 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 10:42:30,783 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 10:42:30,796 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-18 10:42:30,814 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-18 10:42:30,850 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 10:42:30,851 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 10:42:30,851 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 10:42:30,851 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 10:42:30,851 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 10:42:30,851 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 10:42:30,851 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 10:42:30,852 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 10:42:30,891 INFO  L276                IsEmpty]: Start isEmpty. Operand 796 states.
[2020-08-18 10:42:30,920 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-18 10:42:30,921 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 10:42:30,922 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 10:42:30,923 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 10:42:30,929 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 10:42:30,929 INFO  L82        PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times
[2020-08-18 10:42:30,938 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 10:42:30,939 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998748331]
[2020-08-18 10:42:30,940 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 10:42:31,674 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:32,648 WARN  L193               SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 10:42:32,650 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 10:42:32,657 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:32,846 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 10:42:32,847 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998748331]
[2020-08-18 10:42:32,849 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 10:42:32,850 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 10:42:32,850 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934664575]
[2020-08-18 10:42:32,857 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 10:42:32,857 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 10:42:32,872 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 10:42:32,873 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 10:42:32,875 INFO  L87              Difference]: Start difference. First operand 796 states. Second operand 4 states.
[2020-08-18 10:42:33,379 WARN  L193               SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 10:42:38,611 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 10:42:38,612 INFO  L93              Difference]: Finished difference Result 1515 states and 2659 transitions.
[2020-08-18 10:42:38,613 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 10:42:38,615 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 318
[2020-08-18 10:42:38,617 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 10:42:38,646 INFO  L225             Difference]: With dead ends: 1515
[2020-08-18 10:42:38,646 INFO  L226             Difference]: Without dead ends: 1299
[2020-08-18 10:42:38,652 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 10:42:38,677 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1299 states.
[2020-08-18 10:42:38,786 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1297.
[2020-08-18 10:42:38,788 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1297 states.
[2020-08-18 10:42:38,796 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 2028 transitions.
[2020-08-18 10:42:38,797 INFO  L78                 Accepts]: Start accepts. Automaton has 1297 states and 2028 transitions. Word has length 318
[2020-08-18 10:42:38,799 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 10:42:38,799 INFO  L479      AbstractCegarLoop]: Abstraction has 1297 states and 2028 transitions.
[2020-08-18 10:42:38,799 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 10:42:38,800 INFO  L276                IsEmpty]: Start isEmpty. Operand 1297 states and 2028 transitions.
[2020-08-18 10:42:38,806 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-18 10:42:38,806 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 10:42:38,807 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 10:42:38,807 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 10:42:38,807 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 10:42:38,808 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 10:42:38,808 INFO  L82        PathProgramCache]: Analyzing trace with hash 1367796252, now seen corresponding path program 1 times
[2020-08-18 10:42:38,808 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 10:42:38,809 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777484092]
[2020-08-18 10:42:38,809 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 10:42:39,090 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:39,697 WARN  L193               SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 10:42:39,699 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 10:42:39,706 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:40,008 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 10:42:40,009 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777484092]
[2020-08-18 10:42:40,010 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 10:42:40,011 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 10:42:40,011 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931436864]
[2020-08-18 10:42:40,017 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 10:42:40,018 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 10:42:40,018 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 10:42:40,019 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 10:42:40,019 INFO  L87              Difference]: Start difference. First operand 1297 states and 2028 transitions. Second operand 4 states.
[2020-08-18 10:42:40,648 WARN  L193               SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 10:42:45,130 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 10:42:45,131 INFO  L93              Difference]: Finished difference Result 2671 states and 4201 transitions.
[2020-08-18 10:42:45,131 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 10:42:45,131 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 318
[2020-08-18 10:42:45,133 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 10:42:45,147 INFO  L225             Difference]: With dead ends: 2671
[2020-08-18 10:42:45,147 INFO  L226             Difference]: Without dead ends: 2289
[2020-08-18 10:42:45,155 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 10:42:45,160 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2289 states.
[2020-08-18 10:42:45,238 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287.
[2020-08-18 10:42:45,239 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2287 states.
[2020-08-18 10:42:45,252 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3564 transitions.
[2020-08-18 10:42:45,253 INFO  L78                 Accepts]: Start accepts. Automaton has 2287 states and 3564 transitions. Word has length 318
[2020-08-18 10:42:45,254 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 10:42:45,254 INFO  L479      AbstractCegarLoop]: Abstraction has 2287 states and 3564 transitions.
[2020-08-18 10:42:45,255 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 10:42:45,255 INFO  L276                IsEmpty]: Start isEmpty. Operand 2287 states and 3564 transitions.
[2020-08-18 10:42:45,263 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-18 10:42:45,263 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 10:42:45,264 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 10:42:45,265 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 10:42:45,268 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 10:42:45,268 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 10:42:45,269 INFO  L82        PathProgramCache]: Analyzing trace with hash -1797025293, now seen corresponding path program 1 times
[2020-08-18 10:42:45,269 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 10:42:45,269 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453393738]
[2020-08-18 10:42:45,270 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 10:42:45,521 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:46,147 WARN  L193               SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 10:42:46,149 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 10:42:46,159 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:46,337 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 10:42:46,338 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453393738]
[2020-08-18 10:42:46,339 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 10:42:46,339 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 10:42:46,339 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532520138]
[2020-08-18 10:42:46,340 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 10:42:46,341 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 10:42:46,341 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 10:42:46,341 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 10:42:46,342 INFO  L87              Difference]: Start difference. First operand 2287 states and 3564 transitions. Second operand 4 states.
[2020-08-18 10:42:46,772 WARN  L193               SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 10:42:51,006 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 10:42:51,007 INFO  L93              Difference]: Finished difference Result 4943 states and 7762 transitions.
[2020-08-18 10:42:51,008 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 10:42:51,008 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 318
[2020-08-18 10:42:51,010 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 10:42:51,030 INFO  L225             Difference]: With dead ends: 4943
[2020-08-18 10:42:51,030 INFO  L226             Difference]: Without dead ends: 4229
[2020-08-18 10:42:51,033 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 10:42:51,039 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4229 states.
[2020-08-18 10:42:51,148 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4227.
[2020-08-18 10:42:51,149 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4227 states.
[2020-08-18 10:42:51,161 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 6568 transitions.
[2020-08-18 10:42:51,161 INFO  L78                 Accepts]: Start accepts. Automaton has 4227 states and 6568 transitions. Word has length 318
[2020-08-18 10:42:51,162 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 10:42:51,162 INFO  L479      AbstractCegarLoop]: Abstraction has 4227 states and 6568 transitions.
[2020-08-18 10:42:51,162 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 10:42:51,163 INFO  L276                IsEmpty]: Start isEmpty. Operand 4227 states and 6568 transitions.
[2020-08-18 10:42:51,172 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-18 10:42:51,172 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 10:42:51,173 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 10:42:51,173 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-18 10:42:51,173 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 10:42:51,174 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 10:42:51,174 INFO  L82        PathProgramCache]: Analyzing trace with hash 1914723175, now seen corresponding path program 1 times
[2020-08-18 10:42:51,175 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 10:42:51,175 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033498745]
[2020-08-18 10:42:51,175 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 10:42:51,379 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:51,895 WARN  L193               SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 10:42:51,896 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 10:42:51,904 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:52,017 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 10:42:52,017 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033498745]
[2020-08-18 10:42:52,017 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 10:42:52,018 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 10:42:52,018 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750712801]
[2020-08-18 10:42:52,019 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 10:42:52,019 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 10:42:52,019 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 10:42:52,019 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 10:42:52,020 INFO  L87              Difference]: Start difference. First operand 4227 states and 6568 transitions. Second operand 4 states.
[2020-08-18 10:42:52,451 WARN  L193               SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 10:42:56,569 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 10:42:56,569 INFO  L93              Difference]: Finished difference Result 9359 states and 14670 transitions.
[2020-08-18 10:42:56,571 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 10:42:56,572 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 318
[2020-08-18 10:42:56,572 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 10:42:56,606 INFO  L225             Difference]: With dead ends: 9359
[2020-08-18 10:42:56,606 INFO  L226             Difference]: Without dead ends: 8029
[2020-08-18 10:42:56,611 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 10:42:56,621 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8029 states.
[2020-08-18 10:42:56,810 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 8027.
[2020-08-18 10:42:56,811 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8027 states.
[2020-08-18 10:42:56,845 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 12440 transitions.
[2020-08-18 10:42:56,846 INFO  L78                 Accepts]: Start accepts. Automaton has 8027 states and 12440 transitions. Word has length 318
[2020-08-18 10:42:56,847 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 10:42:56,847 INFO  L479      AbstractCegarLoop]: Abstraction has 8027 states and 12440 transitions.
[2020-08-18 10:42:56,848 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 10:42:56,848 INFO  L276                IsEmpty]: Start isEmpty. Operand 8027 states and 12440 transitions.
[2020-08-18 10:42:56,869 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-18 10:42:56,869 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 10:42:56,870 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 10:42:56,870 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-18 10:42:56,871 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 10:42:56,871 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 10:42:56,871 INFO  L82        PathProgramCache]: Analyzing trace with hash 769893352, now seen corresponding path program 1 times
[2020-08-18 10:42:56,871 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 10:42:56,872 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066526833]
[2020-08-18 10:42:56,872 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 10:42:57,198 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:57,767 WARN  L193               SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 10:42:57,769 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 10:42:57,775 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:57,951 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 10:42:57,952 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066526833]
[2020-08-18 10:42:57,952 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 10:42:57,952 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-18 10:42:57,952 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763706653]
[2020-08-18 10:42:57,953 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-18 10:42:57,953 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 10:42:57,954 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-18 10:42:57,954 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-18 10:42:57,954 INFO  L87              Difference]: Start difference. First operand 8027 states and 12440 transitions. Second operand 5 states.
[2020-08-18 10:43:04,756 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 10:43:04,756 INFO  L93              Difference]: Finished difference Result 23754 states and 36777 transitions.
[2020-08-18 10:43:04,757 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 10:43:04,757 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 318
[2020-08-18 10:43:04,758 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 10:43:04,814 INFO  L225             Difference]: With dead ends: 23754
[2020-08-18 10:43:04,815 INFO  L226             Difference]: Without dead ends: 15742
[2020-08-18 10:43:04,833 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-18 10:43:04,849 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15742 states.
[2020-08-18 10:43:05,361 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 15740.
[2020-08-18 10:43:05,361 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 15740 states.
[2020-08-18 10:43:05,390 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15740 states to 15740 states and 24254 transitions.
[2020-08-18 10:43:05,390 INFO  L78                 Accepts]: Start accepts. Automaton has 15740 states and 24254 transitions. Word has length 318
[2020-08-18 10:43:05,391 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 10:43:05,391 INFO  L479      AbstractCegarLoop]: Abstraction has 15740 states and 24254 transitions.
[2020-08-18 10:43:05,391 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-18 10:43:05,391 INFO  L276                IsEmpty]: Start isEmpty. Operand 15740 states and 24254 transitions.
[2020-08-18 10:43:05,423 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 321
[2020-08-18 10:43:05,423 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 10:43:05,424 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 10:43:05,424 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-18 10:43:05,424 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 10:43:05,427 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 10:43:05,430 INFO  L82        PathProgramCache]: Analyzing trace with hash -685152901, now seen corresponding path program 1 times
[2020-08-18 10:43:05,430 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 10:43:05,430 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671296020]
[2020-08-18 10:43:05,431 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 10:43:05,528 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:43:06,048 WARN  L193               SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 10:43:06,049 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 10:43:06,063 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:43:06,190 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 10:43:06,191 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671296020]
[2020-08-18 10:43:06,200 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 10:43:06,200 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 10:43:06,201 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707811003]
[2020-08-18 10:43:06,201 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 10:43:06,201 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 10:43:06,201 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 10:43:06,202 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 10:43:06,202 INFO  L87              Difference]: Start difference. First operand 15740 states and 24254 transitions. Second operand 4 states.
[2020-08-18 10:43:14,238 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 10:43:14,238 INFO  L93              Difference]: Finished difference Result 46481 states and 71518 transitions.
[2020-08-18 10:43:14,238 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 10:43:14,239 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 320
[2020-08-18 10:43:14,239 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 10:43:14,310 INFO  L225             Difference]: With dead ends: 46481
[2020-08-18 10:43:14,310 INFO  L226             Difference]: Without dead ends: 30870
[2020-08-18 10:43:14,351 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 10:43:14,393 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30870 states.
[2020-08-18 10:43:15,488 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30870 to 30868.
[2020-08-18 10:43:15,489 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30868 states.
[2020-08-18 10:43:15,531 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30868 states to 30868 states and 47285 transitions.
[2020-08-18 10:43:15,531 INFO  L78                 Accepts]: Start accepts. Automaton has 30868 states and 47285 transitions. Word has length 320
[2020-08-18 10:43:15,532 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 10:43:15,532 INFO  L479      AbstractCegarLoop]: Abstraction has 30868 states and 47285 transitions.
[2020-08-18 10:43:15,532 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 10:43:15,532 INFO  L276                IsEmpty]: Start isEmpty. Operand 30868 states and 47285 transitions.
[2020-08-18 10:43:15,590 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 321
[2020-08-18 10:43:15,590 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 10:43:15,590 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 10:43:15,591 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-18 10:43:15,591 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 10:43:15,591 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 10:43:15,591 INFO  L82        PathProgramCache]: Analyzing trace with hash -810813248, now seen corresponding path program 1 times
[2020-08-18 10:43:15,592 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 10:43:15,592 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309558390]
[2020-08-18 10:43:15,592 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 10:43:15,628 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:43:16,060 WARN  L193               SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 10:43:16,061 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 10:43:16,067 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:43:17,093 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 10:43:17,094 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309558390]
[2020-08-18 10:43:17,094 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 10:43:17,094 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 10:43:17,095 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62953894]
[2020-08-18 10:43:17,095 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 10:43:17,096 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 10:43:17,096 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 10:43:17,096 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 10:43:17,096 INFO  L87              Difference]: Start difference. First operand 30868 states and 47285 transitions. Second operand 4 states.